@ForsakenRoe Largely because ,in WoW, raids are the only place where those raids come out ahead of non-rDPS utility or damage profile synergies. And there any real difficulty has 20 (Mythic) or 10-30 players (Heroic), so there are slots aplenty.

The question if more damage to beat a timer vs. more defensive or mobility utility to cheese a certain fight is still very much a thing in M+, though.